EL3000
CONTINUOUS GAS ANALYZERS | OI/EL3000-EN REV. D
133
Magnos27 – notes for calibration
Calibration methods
• Automatic calibration:
zero point/end-point calibration or substitute gas calibration
(factory-set if the substitute gas component is set up)
• Automatic calibration:
zero point/end-point calibration or substitute gas calibration
(factory-set if the substitute gas component is set up)
Substitute gas calibration
If the test gases for the adjustment are not available, e.g.
because they cannot be filled in test gas bottles or because their
components are not compatible with one another, the Magnos27
can be set at the factory for calibration with a substitute gas in
accordance with the order.
In addition to the measuring range of the sample component, a
measuring range for the substitute gas component is then set
up at the factory; normally this is O
2
in N
2
. This setting is
documented in the device data sheet.
Substitute gas calibration is a zero point / end-point calibration
of the substitute gas component.
The zero points and end points of the measuring ranges of
sample components in Magnos27 are then corrected by the
values established during this calibration.
Note
• If the analyzer is set to calibration with a substitute gas, the
substitute gas calibration must always be carried out in
order to calibrate all sample and substitute gas components.
• A zero point/end point calibration either only in the sample
components or in the substitute gas measuring ranges
results in an erroneous calibration of the analyzer module.
Tests gases – Magnos27
Analyzer
Test gas for the zero calibration
Test gas for the end-point calibration
Magnos27
Oxygen-free process gas
Process gas with a known O
2
concentration
Magnos27
with substitute gas calibration
Oxygen-free process gas or substitute gas (O
2
in N
2
)
Substitute gas, for example dried air
Dew point
The dew point of the test gases must be approximately equal to the dew point of the sample gas.
